I even have a video tour so that the potential tenants should have a good idea of the layout of the house.

You 100% need to lay out all of the details in writing but the "refrigerator policy" isn't going to make-or-break you.  

Assuming they were all built at the same time, same layouts, upgrades and capex will probably be cheaper.  

How much you want to "bet" on you being able to do that is up to you.What I would do in your shoes is look at the current (open) unit and ask yourself what it might cost to "spruce up" something with that layout, square feet, etc. 

Keep in mind that the units will be separated by interior walls so unit layout will be inverse to the one adjacent to it.Ground floor:2nd floor:3rd floor: Rooftop:A few of my thoughts:Second bedroom bathroom is butted up against the master.

What I look for are ease of conversion (you can get a sense of the layout by walking the property), size of lot (surprisingly it doesn’t have to be massive if the layout is right), and easements (things like power line, telephone pole, etc where others have the right to use your land).

I'm wondering how much is it going to cost to separate the HVAC and electricity panel and reconfiguring the lay out and add a kitchen again. 

In smaller markets, or deals with a unique home layout, it can be hard to find comparable sales to value the home on.

Experienced ones will know the neighborhoods, cite flaws in buildings, give valuable opinions on layouts, help you with contractors, etc...

I also found one old rental listing, some public record details on the layout of the units, and prior tenant names.